本文整理汇总了Python中cmapdb.FileUnicodeMap类的典型用法代码示例。如果您正苦于以下问题：Python FileUnicodeMap类的具体用法？Python FileUnicodeMap怎么用？Python FileUnicodeMap使用的例子？那么, 这里精选的类代码示例或许可以为您提供帮助。
在下文中一共展示了FileUnicodeMap类的5个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: create_unicode_map
def create_unicode_map(self):
if 'cmap' not in self.tables:
raise TrueTypeFont.CMapNotFound
(base_offset, length) = self.tables['cmap']
fp = self.fp
fp.seek(base_offset)
(version, nsubtables) = struct.unpack('>HH', fp.read(4))
subtables = []
for i in xrange(nsubtables):
subtables.append(struct.unpack('>HHL', fp.read(8)))
char2gid = {}
# Only supports subtable type 0, 2 and 4.
for (_1, _2, st_offset) in subtables:
fp.seek(base_offset+st_offset)
(fmttype, fmtlen, fmtlang) = struct.unpack('>HHH', fp.read(6))
if fmttype == 0:
char2gid.update(enumerate(struct.unpack('>256B', fp.read(256))))
elif fmttype == 2:
subheaderkeys = struct.unpack('>256H', fp.read(512))
firstbytes = [0]*8192
for (i,k) in enumerate(subheaderkeys):
firstbytes[k/8] = i
nhdrs = max(subheaderkeys)/8 + 1
hdrs = []
for i in xrange(nhdrs):
(firstcode,entcount,delta,offset) = struct.unpack('>HHhH', fp.read(8))
hdrs.append((i,firstcode,entcount,delta,fp.tell()-2+offset))
for (i,firstcode,entcount,delta,pos) in hdrs:
if not entcount: continue
first = firstcode + (firstbytes[i] << 8)
fp.seek(pos)
for c in xrange(entcount):
gid = struct.unpack('>H', fp.read(2))
if gid:
gid += delta
char2gid[first+c] = gid
elif fmttype == 4:
(segcount, _1, _2, _3) = struct.unpack('>HHHH', fp.read(8))
segcount /= 2
ecs = struct.unpack('>%dH' % segcount, fp.read(2*segcount))
fp.read(2)
scs = struct.unpack('>%dH' % segcount, fp.read(2*segcount))
idds = struct.unpack('>%dh' % segcount, fp.read(2*segcount))
pos = fp.tell()
idrs = struct.unpack('>%dH' % segcount, fp.read(2*segcount))
for (ec,sc,idd,idr) in zip(ecs, scs, idds, idrs):
if idr:
fp.seek(pos+idr)
for c in xrange(sc, ec+1):
char2gid[c] = (struct.unpack('>H', fp.read(2))[0] + idd) & 0xffff
else:
for c in xrange(sc, ec+1):
char2gid[c] = (c + idd) & 0xffff
else:
assert 0
# create unicode map
unicode_map = FileUnicodeMap()
for (char,gid) in char2gid.iteritems():
unicode_map.add_cid2unichr(gid, char)
return unicode_map示例2: PDFSimpleFont
class PDFSimpleFont(PDFFont):
def __init__(self, descriptor, widths, spec):
# Font encoding is specified either by a name of
# built-in encoding or a dictionary that describes
# the differences.
if 'Encoding' in spec:
encoding = resolve1(spec['Encoding'])
else:
encoding = LITERAL_STANDARD_ENCODING
if isinstance(encoding, dict):
name = literal_name(encoding.get('BaseEncoding', LITERAL_STANDARD_ENCODING))
diff = list_value(encoding.get('Differences', None))
self.cid2unicode = EncodingDB.get_encoding(name, diff)
else:
self.cid2unicode = EncodingDB.get_encoding(literal_name(encoding))
self.unicode_map = None
if 'ToUnicode' in spec:
strm = stream_value(spec['ToUnicode'])
self.unicode_map = FileUnicodeMap()
CMapParser(self.unicode_map, StringIO(strm.get_data())).run()
PDFFont.__init__(self, descriptor, widths)
return
def to_unichr(self, cid):
if self.unicode_map:
try:
return self.unicode_map.get_unichr(cid)
except KeyError:
pass
try:
return self.cid2unicode[cid]
except KeyError:
raise PDFUnicodeNotDefined(None, cid)示例3: __init__
def __init__(self, descriptor, widths, spec):
# Font encoding is specified either by a name of
# built-in encoding or a dictionary that describes
# the differences.
if 'Encoding' in spec:
encoding = resolve1(spec['Encoding'])
else:
encoding = LITERAL_STANDARD_ENCODING
if isinstance(encoding, dict):
name = literal_name(encoding.get('BaseEncoding', LITERAL_STANDARD_ENCODING))
diff = list_value(encoding.get('Differences', None))
self.cid2unicode = EncodingDB.get_encoding(name, diff)
else:
self.cid2unicode = EncodingDB.get_encoding(literal_name(encoding))
self.unicode_map = None
if 'ToUnicode' in spec:
strm = stream_value(spec['ToUnicode'])
self.unicode_map = FileUnicodeMap()
CMapParser(self.unicode_map, StringIO(strm.get_data())).run()
PDFFont.__init__(self, descriptor, widths)示例4: __init__
def __init__(self, rsrcmgr, spec):
try:
self.basefont = literal_name(spec['BaseFont'])
except KeyError:
if STRICT:
raise PDFFontError('BaseFont is missing')
self.basefont = 'unknown'
self.cidsysteminfo = dict_value(spec.get('CIDSystemInfo', {}))
self.cidcoding = '%s-%s' % (self.cidsysteminfo.get('Registry', 'unknown'),
self.cidsysteminfo.get('Ordering', 'unknown'))
try:
name = literal_name(spec['Encoding'])
except KeyError:
if STRICT:
raise PDFFontError('Encoding is unspecified')
name = 'unknown'
try:
self.cmap = CMapDB.get_cmap(name)
except CMapDB.CMapNotFound as e:
if STRICT:
raise PDFFontError(e)
self.cmap = CMap()
try:
descriptor = dict_value(spec['FontDescriptor'])
except KeyError:
if STRICT:
raise PDFFontError('FontDescriptor is missing')
descriptor = {}
ttf = None
if 'FontFile2' in descriptor:
self.fontfile = stream_value(descriptor.get('FontFile2'))
ttf = TrueTypeFont(self.basefont,
StringIO(self.fontfile.get_data()))
self.unicode_map = None
if 'ToUnicode' in spec:
strm = stream_value(spec['ToUnicode'])
self.unicode_map = FileUnicodeMap()
CMapParser(self.unicode_map, StringIO(strm.get_data())).run()
elif self.cidcoding == 'Adobe-Identity':
if ttf:
try:
self.unicode_map = ttf.create_unicode_map()
except TrueTypeFont.CMapNotFound:
pass
else:
try:
self.unicode_map = CMapDB.get_unicode_map(self.cidcoding, self.cmap.is_vertical())
except CMapDB.CMapNotFound as e:
pass
self.vertical = self.cmap.is_vertical()
if self.vertical:
# writing mode: vertical
widths = get_widths2(list_value(spec.get('W2', [])))
self.disps = dict( (cid,(vx,vy)) for (cid,(_,(vx,vy))) in widths.iteritems() )
(vy,w) = spec.get('DW2', [880, -1000])
self.default_disp = (None,vy)
widths = dict( (cid,w) for (cid,(w,_)) in widths.iteritems() )
default_width = w
else:
# writing mode: horizontal
self.disps = {}
self.default_disp = 0
widths = get_widths(list_value(spec.get('W', [])))
default_width = spec.get('DW', 1000)
PDFFont.__init__(self, descriptor, widths, default_width=default_width)
return示例5: __init__
def __init__(self, rsrcmgr, spec):
try:
self.basefont = literal_name(spec["BaseFont"])
except KeyError:
if STRICT:
raise PDFFontError("BaseFont is missing")
self.basefont = "unknown"
self.cidsysteminfo = dict_value(spec.get("CIDSystemInfo", {}))
self.cidcoding = "%s-%s" % (
self.cidsysteminfo.get("Registry", "unknown"),
self.cidsysteminfo.get("Ordering", "unknown"),
)
try:
name = literal_name(spec["Encoding"])
except KeyError:
if STRICT:
raise PDFFontError("Encoding is unspecified")
name = "unknown"
try:
self.cmap = CMapDB.get_cmap(name)
except CMapDB.CMapNotFound as e:
if STRICT:
raise PDFFontError(e)
self.cmap = CMap()
try:
descriptor = dict_value(spec["FontDescriptor"])
except KeyError:
if STRICT:
raise PDFFontError("FontDescriptor is missing")
descriptor = {}
ttf = None
if "FontFile2" in descriptor:
self.fontfile = stream_value(descriptor.get("FontFile2"))
ttf = TrueTypeFont(self.basefont, StringIO(self.fontfile.get_data()))
self.unicode_map = None
if "ToUnicode" in spec:
strm = stream_value(spec["ToUnicode"])
self.unicode_map = FileUnicodeMap()
CMapParser(self.unicode_map, StringIO(strm.get_data())).run()
elif self.cidcoding in ("Adobe-Identity", "Adobe-UCS"):
if ttf:
try:
self.unicode_map = ttf.create_unicode_map()
except TrueTypeFont.CMapNotFound:
pass
else:
try:
self.unicode_map = CMapDB.get_unicode_map(self.cidcoding, self.cmap.is_vertical())
except CMapDB.CMapNotFound as e:
pass
self.vertical = self.cmap.is_vertical()
if self.vertical:
# writing mode: vertical
widths = get_widths2(list_value(spec.get("W2", [])))
self.disps = dict((cid, (vx, vy)) for (cid, (_, (vx, vy))) in widths.iteritems())
(vy, w) = spec.get("DW2", [880, -1000])
self.default_disp = (None, vy)
widths = dict((cid, w) for (cid, (w, _)) in widths.iteritems())
default_width = w
else:
# writing mode: horizontal
self.disps = {}
self.default_disp = 0
widths = get_widths(list_value(spec.get("W", [])))
default_width = spec.get("DW", 1000)
PDFFont.__init__(self, descriptor, widths, default_width=default_width)
return